Thomas doane



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THoMAS ooANE, o r RoSTo N, MASSACHUSETTS.

Letters Patent No. 71,999, dated December 10, 1867.

IMPROVRD CARRIAGE roR RooR-DRILLS.

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TO ALL WHOM IT MAY CONGERN:

Be it known that I, THOMAS DOANE, of.thei...cit y Yof Boston, in the county of Suffolk, and Commonwealth of Massachusetts, have invented a new and improved Carriage 4for Rock-Drilling Machinery; andI do hereby declare that the following is a full and exact description thereof. i i

This carriage is designed and constructed for the use of rock-drilling machinesin driving a tunnel or mine; and the nature of my invention consists in so cbnstructing a framework on wheels, or on a truck, that rockdrilling machines may be attached to it', and worked in such a manner as to drive blasting-holes in a tunnel or mine, in any direction that may be required, in order to throwv out the largest possible quantity of rock, andto admit the arrangement of those holes, so as to suit the form or shape of the heading or tunnel, as left by the previous blast.

The proper way of driving a tunnel or mine, being to keep the centre of the face somewhat in advance following after with the sides, blasting the rock from the sides towards thc centre, the forward end of the carriage, upon which the drilling-machines are attached, is formed to correspond with the'shape of the heading.

A further improvement consists in the division of one carriage, for working drilling-machines in the he'ading, into two or more carriages, each one to be worked and operated independently ot' the others. This admits of varying thc width of a tunnel, if required, and facilitates the general manipulation of running back the carriages, one behind the other, during the charging and blasting of the holes, and advancing cars to take away the debris of the blast; and, again, one carriage full of drilling-machines can be set at work before the debris is all removed.

A further improvement consists in the adjustment of the carriage or carriages in a vertical direction, the same being so arranged as to admit the forward end, upon which the drilling-machines are attached, to be raised or lowered at pleasure, within proper limits. This admits of any desirable adjustment of all the drillingmachines attached to the carriage, and also of'varying the height of' the heading, if required.

To enable others skilled in the arts to make and use my invention, I now proceed to describe its construc-I tion and operation, with reference to the accompanying drawing, in which- Figure I is an elevation of carriage, showing the same in a working position in.the heading of a tunnel crimine.

Figure II is a front view..

Figure III is a plan, showing the carriages on a track, in a working position, in the heading of a tunnel.

Figs. II and III show the two single carriages A and B, of which only the former shall be described, as they are both alike, only having the angles Vot their forward parts in opposite directions. C and D, Figs. I and III, are two parallel frames, made of dat iron bars or any other suitable material. These frames are connected firmly bythe braces a and b, Fig. III, and the cross-pieces c, at the extreme back end, FigsI and III.

At the forward end these frames C and D are furthermore connected bythe two round bars'E and F, one at i the top and the other at the bottom. These round bars are made of cast or wrought iron, or other suitable material, and welded or screwed onto the side frames C and D, in such a manner as to form an acute angle, (more or less acute,) d, with the side frames, as shown in Fig. III. `These'ho'rizontal bars E and F may also be extended outside the frames, as shown in plan.

The horizontal bars E and F are again firmly connected by the two upright bars Gr and H, Figs. I and II, made of cast or wrought iron, and screwed or welded on to the round bars E and F. These round bars E, F, G, and H, and the extensions of E and F, Figs. I and II, compose a framework for the reception of rock-drilling machines, which, by means of clamps and turn-tables, are fastened on to those bars, and directed at pleasure so as to reach any point in the height or breadth of the heading. i

InFig., 3, a drilling-machine, K, drawn in red lines, is shown in working position. The dotted lines Int', kJ, m, n, and o represent different directions `and positions of rock drilling-machine on the frame, in order to v work the whole width of the face. Four to six machines, and even more, may be worked on each carriage at thc same time.

In order to remove the carriage out of the reach of the blast, it is provided with four wheels, the two for ward wheels, M and N, and the two hinder wheels, O and P, (see Fig. III.) These wheels run onA a common track, r s, Fig. III. The forward wheels are directly attached to the side frames C and D, by means of the axle L, having its bearings in the side frames, in such a position as that the hinder end of the carriage shall be alittle heavier, with its`load of tools, 85e., than the forward end with its attached drilling-machine, and the wheels are held between two collars and turn on theA axle, The axle of the hinder wheels O and P is not directly connected to the side frames, but has its bearings in the levers S S, Figs. I and III. The levers S S have their fulcra in thev side frames at p, and swing en the round tops p p. One of the levers, S, is furthermore provided with a wheel-segment, T, Figs. I and III, into which gears the pinion u, on the shaft W. This shaft has its bearings in the side'lframes C and D, and is furthermore provided with a ratchet-wheel, V, and a pawl, Z. The pinion u and ratchet V are both keyed on to the shaft W. As the carriage is very nearly balanced upon the forward wheels, by turning the shaft W, with pinion u, it will be seen that either a raising or lowering of the back end of the carriage will easily be effected, resulting in a corresponding depression or elevation of the forward end, and of al1 the drilling-machines attached to it.

The carriage is furthermore provided with four lugs g g g y, at its extreme forward end, Figs. I and II, two

Vof them at the top and two of them at the bottom, and four more similar Alugs 9 9 9 9, two at the top and two at the bottom, near the forward wheels M and N. These lugs are welded or screwed on to 'or made one piece with the side frames C and D. They are provided with a screw-thread and screws,fff, Figs. I, II, and III, by means of which the carriage, after having first been brought into a. proper position, is'securely fastened against top and bottom of the tunnel, and thus prevented from moving or rocking during the operation of drilling the holes.

The operation is now as follows: The tracks X and Y, Fig. III, are first laid nearly up to the face of the heading, and at such distance from each other that the carriages may pass each other, or be run alongside of each other, as shown in Fig. III, without interfering. The carriages are then run forward, and placed at proper distances from the face of the heading. They are next adjusted in a vertical direction to suit circumstances, and after being properly adjusted the screw-boltsff are screwed upwards and downwards against the rock, thus securing the firm position of the carriage. The machine-drills, which may previously have been attached to the carriage, are now put into operation, by connecting to them exible tubes or rubber hose conveying compressed air or steam. After arsuilicient number of holes have been driven, the hose is disconnected and laid aside, the screw-bolts ffflowered, and the carriage pushed back by men, or otherwise, out of the reach of the blast. After the blast is fired, and the track cleared ofthe debris, the manipulation is repeated.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The arrangement of the round bars E, F, G', and H of a rock-drill carriage into a frame, for the reception of rock-drilling machines, which shall be able to reach therefrom any point where it isdesirable to bore a hole, substantially as and for the purpose described` 2.- The position of the horizontal round bars E and F, under an acute (more or lesslangle, d, to the side frame of a rock-drill carriage, or to the alignment of the tunnel, substantiallyas and for the purpose set forth.

3.A The construction of a rock-drill carriage, for driving a` tunnel or mine, so as to swing in a verticalv direction on the forward wheels and axle, substantially as and for the purpose specified.

THOMAS DOANE.

Witnesses:

CEAS. S. LINCOLN, Taos. Mn'rursoN. 

